<template>
  <view>
    <view class="goods-item">
      <!-- 商品左侧图片区域 -->
      <view class="goods-item-left">
        <radio :checked="goods.goods_state" color="#C00000" v-if="showRadio" @click="radioClickHandler"></radio>
        <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
      </view>
      <!-- 商品右侧信息区域 -->
      <view class="goods-item-right">
        <!-- 商品标题 -->
        <view class="goods-name">{{goods.goods_name}}</view>
        <view class="goods-info-box">
          <!-- 商品价格 -->
          <!-- 利用管道符|调用过滤器 -->
          <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
          <!-- 商品的数量 -->
          <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numberChangeHandler"> </uni-number-box>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    name:"my-goods",
    props:{
      goods:{
        type:Object,
        default:{}
      },
      // 决定是否展示图片左侧的radio
      showRadio:{
        type:Boolean,
        // 如果外界没有制定show-radio属性的值，则默认不展示radio组件
        default:false
      },
      // 是否展示价格右侧的NumberBox组件
      showNum:{
        type:Boolean,
        default:false
      }
    },
    data() {
      return {
        // 默认的空图片
        defaultPic:'https://img1.baidu.com/it/u=1093385984,701017343&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=500'
      };
    },
    filters:{
      // 把数字处理为带两位小数点的数字
      tofixed(num){
        return Number(num).toFixed(2)
      }
    },
    methods:{
     // radio组件的点击事件处理函数
      radioClickHandler(){
        // 通过this.$emit()触发外界通过@绑定的radio-change事件，
        // 同时把商品的id和勾选状态作为参数传递给radio-change事件处理函数
        this.$emit('radio-change',{
          goods_id:this.goods.goods_id,
          goods_state:!this.goods.goods_state
        })
      },
      // NumberBox组件的change事件处理函数
      numberChangeHandler(val){
       // 通过this.$emit()触发外界通过@绑定的num-change事件，
        this.$emit('num-change',{
          // 商品的id
           goods_id:this.goods.goods_id,
           // 商品的最新数量
           goods_count:+val
        })
      }
    }
  }
</script>

<style lang="scss">
.goods-item{
  width: 750rpx;
  box-sizing: border-box;
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;
  .goods-item-left{
    margin-right: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    .goods-pic{
      width: 100px;
      height: 100px;
      display: block;
    }
  }
  .goods-item-right{
    display: flex;
    flex: 1;
    flex-direction: column;
   justify-content: space-between;
    .goods-name{
      font-size: 13px;
    }
    .goods-info-box{
      display: flex;
      align-items: center;
      justify-content: space-between;
      .goods-price{
        color: #C00000;
        font-size: 16px;
      }
    }
  }
}
</style>